Preparation of bisphenols salts

A technology for bisphenol and salt products, applied in the field of di-salt preparation, which can solve the problems of unindustrialization, difficulty in obtaining high-purity bisphenol di-salt monomer, and yield of only 50%.

Inactive Publication Date: 2005-02-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct polymerization of bis-substituted diphthalimide monomers and bisphenols is considered to be the most economical synthetic route, but this method has not yet been industrialized
Wherein the most important reason is exactly that it is difficult to obtain high-purity bisphenol disalt monomer with high yield
In 1997, GE Company disclosed a method for preparing bisphenol disodium salt (US pat, 5,663,275), but its yield was only 50%

Method used

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  • Preparation of bisphenols salts
  • Preparation of bisphenols salts
  • Preparation of bisphenols salts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 0.01 mol of bisphenol A, 0.02 mol of NaOH and 200 ml of isopropanol into a 250 ml three-necked flask, pass through nitrogen to remove oxygen, and react at 60°C for 1 hour to obtain a precipitate, filter it under a nitrogen atmosphere, and use 30 ml of Wash twice with hot isopropanol, and reduce pressure at 200° C. for 3 hours to obtain 25.6 g of bisphenol disodium salt with a yield of 94%.

Embodiment 2

[0026] Add 0.01 mol of bisphenol A, 0.02 mol of NaOH and 200 ml of n-propanol into a 250 ml three-necked flask, pass through nitrogen to remove oxygen, and react at 60°C for 3 hours to obtain a precipitate, filter it under a nitrogen atmosphere, and use 30 ml of Wash twice with hot n-propanol, and reduce pressure at 200°C for 3 hours to obtain 25.0 g of bisphenol disodium salt with a yield of 93%.

Embodiment 3

[0028] Add 0.01 mol of bisphenol A, 0.02 mol of NaOH and 200 ml of isobutanol into a 250 ml three-necked flask, pass through nitrogen to remove oxygen, react at 60°C for 1 hour, and obtain a precipitate, filter it under a nitrogen atmosphere, and use 30 ml of Wash twice with hot isobutanol, and reduce pressure at 200°C for 3 hours to obtain 25.6 g of bisphenol disodium salt with a yield of 94%.

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Abstract

Preparation of bisphenol double salts are prepared by reacting bisphenol with alkali in organic solvent inorganic aqueous salt solution, and filtering to directly obtain high purity products with yield>90%.

Description

technical field [0001] The invention belongs to the method for preparing di-salt from bisphenol in organic solvent or inorganic salt solution and alkali. Background technique [0002] Polyarylethersulfone, polyetherketone and polyetherimide are currently one of the most widely used heat-resistant polymer materials, especially polyetherimide, which has attracted much attention due to its unique properties and wide application prospects . The traditional method of synthesizing polyarylether ketone and polyarylether sulfone is under the condition of bisphenol and excess alkali, through the method of azeotropic water, in an aprotic polar solvent, such as N-methylpyrrolidone, It can be prepared by polymerizing with dihalogenated monomers. However, the azeotropic water-carrying method is difficult to ensure the complete conversion of bisphenol, and often contains unconverted mono-salt, so the reproducibility of the polymerization reaction is poor, and it is difficult to obtain h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/66C07C39/12C07C39/44C07C41/26C07C43/23C07C45/64C07C49/786C07C49/83C07C315/04C07C317/22C07C319/20C07C323/20
CPCC07C41/26C07C37/66C07C319/20C07C315/04C07C45/64C07C2103/18C07C2603/18C07C39/44C07C43/295C07C49/83C07C317/22C07C323/20
Inventor 高昌录高连勋丁孟贤
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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